| 1 | R & B Trucking | Crescent, OK 73028-0775 | Oil & Gas Operator | Nov 2021 |
| 2 | R & N Associates | Grapevine, TX 76051 | Oil & Gas Operator | Jan 2024 |
| 3 | R C Taylor Operating Company LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Feb 2024 |
| 4 | R D T Properties | Tulsa, OK 74105-7122 | Oil & Gas Operator | Sep 2017 |
| 5 | R.D. Oil Company | Austin, TX 78755 | Oil & Gas Operator | Apr 2024 |
| 6 | Raker Resources LLC | Houston, TX 77042 | Oil & Gas Operator | Apr 2024 |
| 7 | Ram Asset Management Co | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2015 |
| 8 | Ramsey Property Management LLC | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Jan 2024 |
| 9 | Ramsey Property MGMT Inc | Oklahoma City, OK 73120-1955 | Oil & Gas Operator | Mar 2019 |
| 10 | Range Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2021 |
| 11 | Range Production Company, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 2024 |
| 12 | Raven Petroleum Inc | Oklahoma City, OK 73120 | Oil Operator | Jan 1997 |
| 13 | Raw Crude Oil & Gas LLC | Oklahoma City, OK 73104-1801 | Oil & Gas Operator | Feb 2024 |
| 14 | Ray G H Oil Company | Chickasha, OK 73023-0650 | Oil Operator | Feb 2010 |
| 15 | Real Production Management LLC | | Oil Operator | Jan 2024 |
| 16 | Rebellion Energy LLC | | Oil & Gas Operator | Jun 2022 |
| 17 | Red Hawk Disposal LLC | | Oil Operator | Jun 2023 |
| 18 | Red Hawk Resources Inc | Edmond, OK 73003-3207 | Oil & Gas Operator | Feb 2024 |
| 19 | Red River Oil & Gas Company | Oklahoma City, OK 73132-5120 | Oil & Gas Operator | Mar 2015 |
| 20 | Red Rocks Oil & Gas Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 21 | Red Wolf Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 22 | Redhill Operating LLC | | Oil Operator | Feb 2024 |
| 23 | Reeves Harold D | | Oil & Gas Operator | Apr 1992 |
| 24 | Revelation Resources | Cypress, TX 77410-2578 | Oil & Gas Operator | Jan 2024 |
| 25 | Revolution Operating Company,LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Apr 2024 |
| 26 | Revolution Resources LLC | | Oil & Gas Operator | Jun 2023 |
| 27 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 28 | Ricks Exploration Co | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 29 | Riley Lee Roy | Chickasha, OK 73018-9306 | Oil & Gas Operator | May 2006 |
| 30 | Rimrock Resource Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 31 | Riviera Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2024 |
| 32 | RMS Monte Christo, LLC | Snowmass VLG., CO 81615 | Oil & Gas Operator | Mar 2023 |
| 33 | Roan Resources LLC | | Oil & Gas Operator | Oct 2023 |
| 34 | Roberts & Murphy, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Apr 2016 |
| 35 | Robinson Operating Company | Abilene, TX 79604 | Oil & Gas Operator | Aug 2012 |
| 36 | Rocky Roads Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 37 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 38 | Roka Management Inc | | Oil & Gas Operator | Jan 2024 |
| 39 | Rose Rock Resources Inc | Wagoner, OK 74467-8362 | Oil & Gas Operator | Jan 2024 |
| 40 | Rosetta Resources Operating LP | San Antonio, TX 78216 | Oil & Gas Operator | Apr 2024 |
| 41 | Royal Oaks Petroleum Corp | Fort Worth, TX 76116 | Oil & Gas Operator | Dec 2001 |
| 42 | RPM Oilfield Services LLC | | Oil & Gas Operator | Jan 2024 |
| 43 | Rupe Oil Company, Inc. | Wichita, KS 67278 | Oil & Gas Operator | Dec 2023 |
| 44 | Russell D Meloy Oil & Gas Co | Enid, OK 73703-1623 | Oil & Gas Operator | Feb 2024 |